Sewing machine



SEWING MACHINE Filed OCt. 6, 1931 Patented Oct. 24, 1933 PATENT OFFICESEWING MACHINE Clarence C. Wilson, Auburn, Maine, assignor -to UnitedShoe Machinery Corporation, Paterson, N. J., a corporation of New JerseyApplication October 6,

3 Claims.

The present invention relates to sole sewing machines of the McKay typein which the shoe is supported on a rotatable horn located within theshoe and constructed to carry a rotary whirl 5 which places thread inthe hook of the needle after the needle has passed through the sole andthrough the needle hole in the tip of the horn and entered the needlehole in the whirl.

In threading the horn, the practice has been 10 to pass the threadupwardly through the eccentric thread eye formed in the whirl, andthence upwardly through the needle hole in the tip of the horn. Thethread eye in the whirl is necessarily small because of the limited sizeof the whirl and consequently causes considerable delay andinconvenience in the threading operation. The object of the presentinvention is to eliminate this delay and inconvenience and, to that end,the whirl, hereinafter described as embodying the preferred form of theinvention, is provided with a thread passage extending from the needlehole formed therein to the eccentric Y thread eye, thus permitting thethreading of the whirl by passing the thread through the needle hole andthen transferring it sideways to the thread eye through said passage. Inthe illustrated embodiment of the'invention the thread passage in thewhirl is arranged to effect the automatic transfer ofthe thread from theneedle hole into the thread eye during the rotation of the whirl. In itsbroader aspects, however, the invention includes a thread passageextending from the needle hole to the thread eye whereby the operatormay manually transfer the thread to the thread eye after passing itupwardly through the needle hole in the whirl. Also in its broaderaspects the invention contemplates, in a whirl, any arrangement ofthread passage or slot extending from the thread eye through which 40the thread may be passed sideways into the thread eye in threading thewhirl.

A horn embodying the present invention is illustrated in theaccompanying drawing in which Figure 1 is a View in vertical sectionofthe tip of the horn; and Figure 2 is a plan view of the whirl.

The horn illustrated in the drawing is of usual construction andcomprises the body portion 4 in the upper portion of which a drivingshaft 6 is mounted in the usual manner, and a cap piece 8 secured to theupper surface of the body portion 4. The whirl is indicated at 10 and inthe construction shown consists of a disc journaled in the body portion4 Ain the usual manner and having bevelled gear teeth formed in 1931.Serial No. 567,208

(Cl. 11B- 34) its periphery for engagement with a bevelgear 12 at theend of the driving shaft 6. The whirl is provided with the usualeccentric thread eye 14 and needle hole 16.

In accordance with the feature of the invention, the thread eye andneedle hole are connected by a thread passage 18 so formed that theouter wall of the passage together with the periphery of the hole, formsa spiral surface extending from a point near the center of the whirl tothe periphery of the eccentric thread eye 14.

The threading operation is as follows: The thread is passed upwardlythrough the needle hole 16, the work is mounted on the horn and themachine is thrown into operation thereby rotating the whirl in thedirection of the arrow a, rligure 2, and transferring the thread,relatively to the whirl, in the direction of the arI'OW b, Figure 2,about the periphery of the needle hole 16, thence along the outer wallof the thread passage Y18, and finally, at the endof a completerevolution of the whirl, positioning the thread within the eccentricthread eye 14. The thread is held against the periphery of the needlehole by the strain exerted thereon in mounting a shoe upon the horn,thus insuring the entrance of the thread into the thread passage 18 inthe whirl as said passage comes into position to receive the thread.

The nature and scope of the invention having been indicated, and anembodiment of the invention having been specifically described, what visclaimed is: v

1. In a work supporting horn for sewing machines of the McKay type, arotary Whirl journaled therein provided with a needle hole and providedalso with an eccentric thread eye and with a thread passage extendingfrom the needle hole tothe thread eye. Y

2. In a work supporting horn for sewing machines of thev McKay type, arotary whirl journaled therein provided with a needle hole, providedalso with an eccentric thread eye and with a thread passage extendingfrom the needle hole to the thread eye and arranged to effect thetransfer of the thread from the needle hole into the thread eye duringthe rotation of the whirl.

3. In a work supporting horn for sewing machines of the McKay type, arotary whirl journalled therein provided with a needle hole, andprovided also with an eccentric thread eye and with a thread passageextending from the thread eye through which thev thread is passedsideways into the thread eye in threading the whirl. i

CLARENCE C. WILSON.

